Barclays discloses that it has been fined £290m by UK and US regulators for attempting to manipulate Libor between 2005 and 2009. Andrew Tyrie, chairman of the Treasury Select Committee, calls for Bob Diamond to appear before his committee, saying: "This is appalling. It beggars belief that this sort of attitude should have been so widespread."

Thursday June 28

Political pressure mounts on Bob Diamond. The Prime Minister puts him on the spot by saying people "have to take responsibility for their actions" and that applied "all the way to the top". The Chancellor makes a statement to Parliament over the Libor scandal in which he says the behaviour was a "shocking indictment of the culture at banks like Barclays". It also emerges that the Serious Fraud Office has begun talks with regulators about potential criminal investigations into both Barclays and rival banks. Some £3.2bn is wiped off the bank's market value. Mr Diamond writes to Mr Tyrie defending some of the bank's actions. The traders were out for themselves, he says, but the manipulation by "senior management" was "to protect the bank". Others were at it, too, he adds.

Barclays is one of four UK banks ordered by the FSA to compensate small businesses to which it mis-sold complex derivatives. At a financial stability press conference, Sir Mervyn King, Governor of the Bank of England, and Lord Turner, FSA chairman, refuse to back Mr Diamond on two occasions and attack Barclays' culture. Their colleague Andrew Bailey drops a stronger hint, saying: "If, as we now see, there is a fundamental breakdown of trust, then the boards of these institutions have to recognise that the trust has to be got back. And they have to think very hard about how that is done." Sir Mervyn and David Cameron reject Labour's calls for a full banking inquiry.

Saturday June 30

The TSC announces Mr Diamond has been called to appear before it on Wednesday July 4.

Sunday July 1

Newspapers quote Barclays shareholders calling for Mr Diamond and chairman Marcus Agius to resign. In the afternoon, it becomes clear that Mr Agius will announce his resignation on Monday morning. Details also emerge of a conversation between Mr Diamond and Paul Tucker, Deputy Governor of the Bank, in 2008. The conversation was mistakenly understood within Barclays, it is claimed, to mean the Bank had instructed it to lie about Libor. Business Secretary Vince Cable backs calls for a criminal investigation into the bankers involved.

Monday July 2

Mr Agius announces his departure and unveils plans for an independent review of the bank's culture and business practices. Non-executive Mike Rake is named deputy chairman. The Chancellor announces a review of the way Libor and other "price-setting mechanisms in financial markets" are set and a cross-party parliamentary inquiry into professional standards in banking.

Tuesday July 3

Mr Diamond announces his resignation "with immediate effect". Mr Agius is reinstated as "full-time" chairman to search for a new chief. The Chancellor says: "Bob Diamond has done the right thing for the bank and the country. I hope it's a first step to a new culture of responsibility in British banking." In the afternoon, Barclays' chief operating officer, Jerry del Missier, steps down. Barclays releases documents showing their attempts to alert regulators to Libor rigging and Mr Diamond's damning memo of the conversation with Mr Tucker.